Just want to know what B3 stands for that all here a pic. Could it be the grade?

 

B3? You sank my battleship!

I'd like to know the answer too.

 

Bueno, Bonito y Barato (Good, Pretty, and Cheap)

 

I was right it's a standard mark got the answer from another forum.
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2usem&1211327103

 

I see it mentioned, but is there a definition of what it means in relation to the parts or Standard, Elaboré, etc?

 

Who know probable companys grid out these marks and sell them like that need to ask my watch guy in Chicago next time I go out there.